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Anion exclusion and sorption effect for compacted bentonite: the dependency of diffusion coefficients and capacity of HTO and Se(IV)

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Abstract

Quantitative calculation based on the joint action of anion exclusion and sorption has not been reported. This article studies the diffusion behavior of Se(IV) in MX-80 bentonite fills in different lengths by the through-diffusion method. The anion exclusion and sorption are simultaneously considered and quantitatively calculated. The results show that the effective diffusion coefficient of Se(IV) decreases with the increasing lengths of bentonite plug, because of the joint action of anion exclusion and sorption. On this basis, the anion exclusion and sorption are first quantitatively calculated, then a new theory for calculation is proposed in this article. The calculation results show that the ratio of anion exclusion and sorption. In groundwaterenvironments and seawaterenvironments, the weight of sorption is lower than anion exclusion in diffusion process.

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Acknowledgements

This research is supported by grants from National Natural Science Foundation of China (21761002), The State key Laboratory Project jointly built by the Ministry of Nuclear Resources and Environment (NRE1313), National defense basic scientific research project (JCKY2017401C005) and Nuclear energy development project.

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Authors and Affiliations

  1. State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang, 330013, China

    Jie Kong, Chuan-Pin Lee, Yuzhen Sun, Rong Hua, Weigang Liu, Zhifen Wang, Yang Li & Yudan Wang

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  1. Jie Kong
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  2. Chuan-Pin Lee
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  3. Yuzhen Sun
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  4. Rong Hua
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  5. Weigang Liu
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  8. Yudan Wang
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Correspondence to Chuan-Pin Lee or Rong Hua.

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Kong, J., Lee, CP., Sun, Y. et al. Anion exclusion and sorption effect for compacted bentonite: the dependency of diffusion coefficients and capacity of HTO and Se(IV). J Radioanal Nucl Chem 328, 717–725 (2021). https://doi.org/10.1007/s10967-021-07688-x

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